Shock-absorber.



0. FLOLIVER,

SHOCK ABSORBER. APPLICATION FILED JUNE 14 1915- RENEwED AUG. 2.0 I91?- 1 60,019. Patented Mar. 19, 1918.

2 SHEETS-SHEET I.

x J WITNESSES 0002a)" Fran/rlzhO/zben I Ana/ rs.

D. F. OLIVER.

SHOCK ABSORBER.

APPLICATION FILED JUNE 14. 1915. RENEWED AUG. 20. 1911.

A TTORNEY 'INVENTOR 006222 flan/ Vin dliuez' 2 SHEETS-SHEET 2.-

WITNESSES:

- UNITED STATES PATENT OFFICE. noc'ron FnAnKLm omvnn, or oaxnann, cALIronnIa; 111mm 1*. omvnr. nxncu'rnfi: or sari) :oocron FRANKLIN oLIvEn, nncnasnn.

SHOCKAABSORBEB.

Application filed June 14, 1915, Serial No. 34,031. Itenewed August 20, 1917. Serial 110. 187,258.

To all whom it may concern: i -Be it known that I, Doc'ron FRANKLIN Omvna, a citizen of the United States, and a.

resident of Oakland, in the county of Alameda and State of Californla, have invented dent to a sudden downward movement of the chassis and also during a sudden rebounding movement.

In order to accomplish the desired result, use is made of a friction brake having a fixed member movable bodily with the vehicle. body. and a .slidablemember normally in light frictional contact with the said fixed member, and an actuatingjmember carrying springs engaging the said slidable member to forcibly move the slidable member in frictional engagement with the fixed member to carry the same along on a sudden downward movement of the vehicle body, the said actuating member returning automatically to normal position as soon as the force of the sudden movement is spent;

Use is also made of flexible means connecting .theactuating member with the axle of the vehicle for checking the rebound'of the vehicle'body. A practical embodiment'of the invention is represented in the accompanying draw-.-

' line 22 of Fig. 1;

t-ion of the shock ,absorber;-

' Fig. 5 1s a similar new of the same with the parts in posit-ion. on a sudden downward movement of the vehicle body; and

Fig. 6 is a CIQSS SECtIOlI of theisame on the line 66 ofFig. 4.

* The chassis A and the axle 13' of the .vehicle areconnected with each other'in the usual manner by springs'C, .each fastened plainly indicated in Figs. 1 and 2. clip D carries a split bearing G in which is held a vertically adjustable guideway H,

by clips D to a bracket E secured to the chassis A and by clips F to the axle B, as Each preferably in the form of a casin of diamond shape in plane, as plainly indicated in Fig. 3. The free ends ofthe split hearing Gare connected with each other by a bolt G" which when loosened allows up and down adjustment of the guideway H in the bearing G. After the desired adjustment of the guideway H has been made the nut of the bolt isscrewed up to securely clamp the guideway H-in place. \Vithin the guide way His mounted to slide afriction member in the form of two shoes I and Y made V shape at their outer. faces to fit thezcorresponding inner faces of the guideway 'H, i

fit correspondingly haped resilient mem hers J and J of a plunger J extendin downward through the .bottom H of the" guidewayH to connect at its lower endby a leather or other flexible strap K with an iso axle stop which may be the. axle itself or anypart-fixed thereon. As shown, the bottom'of the plunger J is in the path of and spaced from an axle stop in the form of an extension of the top plate. F' of the clip F. The resilient members J ,J 2 are preferably in the form of flat springs held at their upper and lower ends in the top and bottom of a loop J formed on. the upper end of the plunger J, as will be readily understood by reference to Figs. 4, 5 and 6. When the parts are in normal position, as shown in Fig. 4, the top and bottom of the shoes I and I are distances from the top and bottom ofthe loop J 3 so that the movement of the reslhent members J, J relative to the shoes I, I is limited, and when the extreme position in an upward direction is reached and the plunger -J moves still farther upward then the bottom of the loop J contacts with the bottoms of the shoes 1,1 and carries the same along inan up: ward direction. In a like manner when the resilient. members J, J reach an extreme latter moves still fartherdownward then .105 lowermost position between. the shoes I, I during the descent of the plunger J andthe".

the top of the loop 3 contacts with the tops of the shoes I, I and carries the latter along in a downward direction.

Normally the resilient members J and J 1 press the shoes I and I in light frictional contact with the inner surface of the guideway H. When the chassis A and the axle ing as a shock absorber. In case of a sudden downward movement of the vehicle body, the sudden contact of the plunger J with the fixed part 'F causesthe plunger to move suddenly upward and its members J and J are driven out of the seats 1 ,1 especially as the inertia of the shoes I, 1 holds the latter against upward movement. The resilient members J, J in assuming the position shown in Fig. 5, force the shoes I, 1 into strong frictional contact with the guideway H and then move the same along in the guideway until the downward movement of the vehicle body ceases. During the simultaneous movement "of the plunger and shoes the shock of the vehicle body is absorbed. As soon as the force of the downward movement of the vehicle body is spent, the resilient members J, J 2 return by their resiliency to the seats 1 I thus allowing the shoes I, I to move out 'of forcible contact with the guideway H. During the return movement of the vehicle body the strap K pulls the plunger J and with it the shoesl, I downward to the normal position shown in Fig. 4.

In case of a sudden rebound the strap K pulls the plunger J suddenly downward so that the resilient members J J 2 leave their seats in a downward direction and press the shoes in firm contact with the guideway H, and then the plunger and shoes move together downwardly togia'bsorb the shock incident to the rebound. After the force of the latter, the spring members J, J 2 return to heir seats to release the shoes from forcible contact with the guideway H.

A light spring L is arranged in the lower end of the guideway H and bears on the under side of "the shoes to return the ,latter in an upward direction to normal position'after being released, as above explained. In normal'position, the shoes I, I are in an approximately alf-way position between the bottomand top ofthe guideway H.-

The shock absorber'shown and described is simple and durable in construction and can be readily attached to the vehicle without practically changing any of the parts thereof.

Having. thus. described my invention, 1 claim as new and desire to secure by Letters Patent:

1. A shock absorber for vehicles, compris ing a brake having a member fixed to the vehicle body and a braking member normally in light frictional contact with the fixed member, and resilient actuating means having inclined faces adapted to move the said brakingfmember into forcible frictional contact with'thefixed member and moving it along the same during a sudden movement of the vehicle body.

2. A shock absorber for vehicles, comprising a brake having a member fixed to the vehicle body and a braking member normally in light frictional contact with the fixed member, resilient actuating means having inclined faces adapted to move the said braking member into forcible -frictional contact with the fixed member and moving it along the same during a sudden movement of the vehicle body, and flexible means connecting the said actuating means with the axle to take up the shock during a rebound.

3. A shock absorber for vehicles, comprising a brake having a member fixed to the vehicle body and a braking member normally in light frictional contact with the fixed member, a stop member carried by the axle and actuating means adapted to move the said braking member into forcible frictional contact with the fixed member and moving it along the same during a sudden movement of the vehicle body, the said actuating means being normally spaced from said stop member and adapted to move in contact with the same on a downward movement of the vehicle body.

4. A shock absorber, comprising a guideway, friction shoes. slidably mounted in the guideway and in light frictional contact therewith, and a plunger having resilientmembers in frictional engagement with the said shoes to move the latter along in the guideway on a slow movement of the guideway relatively tothe plunger, the said resilient members moving the shoes in forcible contact with the guideway on a sudden movement of the guideway and plunger relatively one to the; other.

5. A shock absorber, comprising a guideway adapted to be attached to the vehicle chassis a pair of shoes slidable in the said guideway, and a plunger flexibly connected with the axle and adapted to engage the axle on a movement of the guideway and.

plunger toward or from each other, the said plunger being provided'with resilient members slidably engaging the said shoes and normally pressing the same with a light force in frictional engagement with the said the said shoes in forcible frictional contact with the guideway and to then carry the shoes along.

6. A shock absorber, comprisin a guideway adapted to be attached to t e vehicle chassis, a pair of shoes slidable in the said guideway, a plunger connected with the axle and provided with resilient members slidably engaging the said shoes and pressing the same with a light force in frictional engagement with the said guideway, the said shoes and resilient members having inclined contacting faces to slide the shoes in the guideway on a slow movement of the chassis and axle toward or from each other and to cause the plunger to slide on the shoes on a sudden movement of the chassis and axle toward each other to move the said inclined faces of the plunger lengthwise on the inclined faces of the shoes to press the latter forcibly in frictional contact with the guideway and carrying the shoes along, and means for limiting the relative movements of the parts.

7. A shock absorber, comprisin a guideway adapted to be attached to t e vehicle chassis, a pair of shoes slidable in the said guideway, a plunger connected with the axle and provided with resilient members slidably engaging the said shoes and pressing the same with a light force in frictional engagement with the said guideway, the said shoes and resilient members having inclined contacting faces to slide the shoes in the guideway on a slow movement of the chassis and axle toward or from each other and to cause the plunger to slide on the shoes on a sudden movement of the chassis and axle toward each other to move the said inclined faces of the plunger lengthwise on the inclined faces of the shoes to press the latter forcibly in frictional contact with the guideway and carry the shoes along, and a spring on the guideway engaging the said shoes to return the latter to normal position in the guideway.

8. A shock absorber provided with a. guideway, a pair of shoes in the said guideway and having inclined seats on their opposite faces and a plunger having resilient angular arms engaging the said shoe seats.

9. A shock absorber, comprising a guideway, friction shoes slidably' mounted in the guideway and in light frictional contact therewith, and a plunger having resilient members in frictional engagement with the said shoes to move the latter along in the guideway on a slow movement of the guideway relatively to theplunger, the said resilient members moving the shoes in forcible contact with the guideway on a sudden movement of the guideway and plunger relatively one to the other, the said plunger contacting with the said shoes and moving the same bodily along on the resilient members reaching their extreme positions on the shoes and on further movement of the plunger.

10. A shock absorber, comprising a ideway, friction shoes slidably mounted 111 the said guideway and in light frictional contact therewith, the shoes having angular seats at their opposite faces, a plun er having a loop extending between the said shoes and having its top and bottom normally spaced from the top and bottom of the said shoes, and resilient members in the form of flat springs held .in the said loops and having angular arms engaging the said seats.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

DOCTOR FRANKLIN OLIVER. 

